What are some alternatives?
When comparing Adium and Pidgin, you can also consider the following products
Trillian - Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
Jitsi - Open-source video calling and chat platform.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Miranda IM - Miranda IM is the smaller, faster, easier instant messenger with support for multiple protocols.
Facebook Messenger - Facebook Messenger is a faster way to message.